Silver-plated copper containing paste for solar cell back electrode and method for preparing silver-plated copper containing paste

Abstract

The invention discloses silver-plated copper containing paste for a solar cell back electrode and a method for preparing the silver-plated copper containing paste. The silver-plated copper containing paste for the solar cell back electrode is made by mixing adhesives, silver containing powder and diluents, wherein the silver containing powder is made by mixing silver powder, silver-plated copper powder and glass powder according to a weight ratio of (15%-40%): (50%-80%): (1%-10%). Existing pure silver power is replaced by the silver containing powder made by mixing the silver powder, the silver-plated copper powder and the glass powder, cost of back electrode paste is greatly lowered, and production cost of cells is further reduced. In addition, the preparation method of the silver-plated copper containing paste is simple and suitable for industrial production, the problem of oxidation of pure base metal paste during sintering of cells is solved, and the prepared silver-plated copper containing paste for the solar cell back electrode is low in contact resistance, high in cell conversion efficiency and high in weldability adhesion.

Description

technical field [0001] The invention belongs to the field of solar cell paste, and in particular relates to a solar cell back electrode paste prepared by substituting base metal silver-plated copper powder for most pure silver powder. Background technique [0002] With the rapid development of the information industry, electronic paste plays an important role as its key material. Therefore, high-performance and low-cost raw materials will greatly improve the competitiveness of electronic products, and will inevitably become an inevitable condition for the development of the electronic paste industry itself. The main component of current front and back silver pastes is metallic silver, which belongs to the series of precious metals. Therefore, silver paste is one of the most expensive raw materials in the process of preparing solar cells except silicon wafers. The cost reduction and localization of raw materials will be of great significance to the low-cost trend of the sola...

AI Technical Summary

Problems solved by technology

At present, the sintering oxidation problem faced by the base metal slurry requires the cooperation of equipment manufacturers such as sintering furnaces, which increases the difficulty of its application.

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